Yeah the girl isn't in the wrong? LOL LOL
Obviously a relationship requires both people to be willing as far as normal circumstances go. Abuse or like this story shows such as potential date rape etc could end up forcing a woman into a ongoing nonconsensual relationship.
HOWEVER the MC relationship with her is obviously not that. She's simply changed her mind on the man she's been with for probably a while because of outside pressures from her gold digging mother and snotty bitch of a best friend. Combined with a 'better' suitor near at hand she decided to toss out her long term love for better 'social circumstances'.
The reality is this happens quite often because people are trash fools who view life through a very small lens.
This is exactly why real non-arrogant wealthy people hide their wealth when seeking a companion. It's to determine if someone truly cares about them or just their money. Good friend of mine owns his own ranch with horses (he likes horses) & has 10s of million from business but wears regular people clothes and drives a 10 year old regular sedan. Not even some fancy luxury model.